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US 4,734,465 AGranted
Vulcanizable compositions of fluoroelastomers having improved self-lubricating properties and a fast cure rate
AssigneeMontedison S.p.A.
InventorsGiovanni Moggi, Gianna Cirillo
Life of this patent
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Abstract
Vulcanizable fluoroelastomer compositions having as base a copolymer of vinylidene fluoride (from 40 to 84 mol %) with perfluoropropene (15 to 30 mol %) and with tetrafluoroethylene (0.30 mol %) and containing a vulcanizing agent of the polyhydroxy compound type, an accelerator of the aminophosphinic compound type, metal oxides and/or hydroxides of basic character and an alkyl, cycloalkyl or aryl compound from the group of phosphoric esters, aminophosphoric esters, sulfoxides and sulfones.
Claims10
A vulcanizable fluoroelastomeric composition consisting essentially of:
- (a) 100 parts by weight of a copolymer having a base of vinylidene fluoride (40 to 84 mol%), perfluoropropene (from 15 to 30 mol%) and tetrafluorethylene (0 to 30 mol%);
- (b) from 0.3 to 6 parts by weight of one or more compounds of the general formula R.sub.n X in which n equals 2 or 3, X is a bivalent or trivalent group selected from:
- phosphoric esters ##STR6## phosphine oxide ##STR7## sulfoxide SO and sulfone SO.sub.2, and R is an alkyl, cycloalkyl or aryl radical having from 1 to 18 carbon atoms, wherein two alkyl radicals may be taken together to form a bivalent alkylene radical;
- (c) from 0.3 to 6 parts by weight of a polyhydroxy compound of the type known as vulcanizing agent for fluoroelastomers;
- (d) from 0.2 to 4 parts by weight of an aminophosphine or phosphoraneamine compound of the type known as accelerating agent in the vulcanization of fluoroelastomers with the polyhydroxy compounds (c);
- (e) from 1 to 20 parts by weight of one or more acid acceptors formed of metal oxides, hydrates or carbonates having a basic character, of the type known in the vulcanization of fluoroelastomers.
3 more elements
Dependencies are inferred from the claim text.